docs: def cli(env, identifier, hardware_identifier, virtual_identifier):
      """Attach devices to a ticket."""
      ticket_mgr = SoftLayer.TicketManager(env.client)
  
      if hardware_identifier and virtual_identifier:
          raise exceptions.ArgumentError("Cannot attach hardware and a virtual server at the same time")
  
      if hardware_identifier:
          hardware_mgr = SoftLayer.HardwareManager(env.client)
          hardware_id = helpers.resolve_id(hardware_mgr.resolve_ids, hardware_identifier, 'hardware')
          ticket_mgr.attach_hardware(identifier, hardware_id)
      elif virtual_identifier:
          vs_mgr = SoftLayer.VSManager(env.client)
          vs_id = helpers.resolve_id(vs_mgr.resolve_ids, virtual_identifier, 'VS')
          ticket_mgr.attach_virtual_server(identifier, vs_id)
      else:
          raise exceptions.ArgumentError("Must have a hardware or virtual server identifier to attach")